I thought it was perhaps an incorrect entry, but I've spotted mentions of it in the Vancouver Sun in several editions of September 1927. The paper actually wrote about it in its radio page of October 22, 1927.

CHPC Broadcasts Its Church MusicBroadcasting by phantom license, CHPC, the Presbyterian church, although only lately entering the field of radio, has a large unseen audience at its command. CHPC broadcasts only church services. It use the transmitter of CKCD. The latter is using a power of 100 watts and broadcasts news items in addition to a weekly concert of music. The transmitter and studio is located in the downtown district.

Radio Digest says the station only operated on Sundays at 11 a.m. and 7:30 p.m. When it received the license and when it stopped operating, I cannot discover. It was gone by 1928. CKCD had a different phantom station in operation then, CHLS, co-owned by the man running CKCD, Billy Hassell.

I have not researched the topic, but broadcasting-history.ca (CCF) states that Phantom Stations were outlawed in 1933. Prior to that, they were fully licensed, with call letters and everything, to operate using the transmitter of another station.

I had never heard of CHPC before. The only other Phantom Station I've heard of, in Vancouver, was CHLS, which CCF lists as providing "Entertainment" while CKCD provided the Newscasts. The Vancouver Province owned CKCD and was really only interested in News programming.

Most other major Canadian cities had CNR Radio running Phantom Stations, rather than having their own transmitter, as they did in Vancouver.

It is important to differentiate between Phantom Stations and stand-alone stations that shared the same frequency. Both had separate call letters, but Phantom Stations always shared the same transmitter with the "main" station.

Up until World War II, Canada had a lot of stations that shared the same frequency.